I’ve bee so impressed with Android Kit-Kat on the Nexus 4 today that I’ve decided to upgrade my Nexus 7 to Android 4.4 before the OTA udgrade is available. Here’s a link to all of the factory images for Nexus devices… this is one of the selling points of having a Nexus:) This time I fooowed the below guide, gracious to Talk Android

Power off your nakasi Nexus 7, and power back on by holding the Volume Up and Volume Down buttons while it boots.

The fastboot menu should appear and you should see “Start” in the top right. Press Volume Up till it changes to “Recovery.” Press the Power button to select it.

You will see an Android with a red exclamation point icon, press Volume Up and the Power button at the same time.

You will get a new menu and you can navigate to “apply update from adb.”

Now it’s time to connect your nakasi Nexus 7 to your computer via a USB cable

Open the command prompt in Windows (cmd in Windows, regular shell in Linux and Mac) and navigate to the directory that the Zip file is located in.